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Install the element return mounting plate (PN 10-1608-01). Use four of the 1-3/4” aluminum saddles
(PN 10-1601-03), 5/16” x 3-1/2” hex head bolts (PN 60-0065) and 5/16” Nylock nuts (PN 60-0046) as
shown in
figure 4.01
. Tighten the nuts, but leave loose enough to adjust for the center-to-center
measurement. Again using four of the 1-3/4 aluminum saddles, 5/16” x 3-1/2” hex head bolts, and Ny-
lock nuts, loosely install the return tube saddles as shown in
figure 4.02
.
Insert the element return tube (PN 10-1015-11) as shown in
figure 4.03
. Be sure that the return tube
is protruding out approximately 2.25 inches away from the aluminum saddle edge on each side, as
shown in
figure 4.04
. Tighten the saddles to a maximum of 7 ft lb (9.5Nm). This is very important.
The aluminum saddles can crush the fiberglass tubes if the saddles are too tight. DO NOT put a set
screw in the aluminum saddles that are used on the fiberglass return tube material.
Measure 3-7/8” from the left edge of the boom to the center-point of the return tube as shown in
fig-
ure 4.05
. Level the return bracket assembly as shown in
figure 4.06
and tighten the saddle bolts so
that the return plate cannot move, but leave loose enough for center-point to center-point measure-
ment in the next portion of the instructions. Do not forget to use anti-seize on all stainless steel fasten-
ers, and also remember to install a set screw into each saddle pair (one set screw per saddle pair).
CHAPTER FOUR
SECTION 4.0
REFLECTOR EHU (continued)
RETURN TUBE ASSEMBLY—REFLECTOR
FIG. 4.01
FIG. 4.02
FIG. 4.03
FIG. 4.04
FIG. 4.05
FIG. 4.06